Ticket #25963: 25963.diff

src/wp-admin/js/theme.js

@@ -682 +682 @@
                 // Render results
                 this.view.render();
 
-                // Calls the routes functionality
-                this.routes();
+                if ( window.history && window.history.pushState ) {
 
-                // Set ups history with pushState and our root
-                Backbone.history.start({ root: themes.data.settings.root });
+                        // Calls the routes functionality
+                        this.routes();
+
+                        // Set ups history with pushState and our root
+                        Backbone.history.start({ root: themes.data.settings.root, pushState: true });
+                }
         },
 
         routes: function() {